How to get the last deleted letter of name of view?

Hello.

SW 2018.

For example:

I create the first section view named A,

then second section view named B,

third section view named C

etc...

Then I delete second view B and I have free name B for the next view I'll create.

How to define this unused letter automatically via API for putting it as a name while creating next view? 

SolidworksApi/macros